740B EJECTOR Articulated Truck Caterpillar


System Pressure Release

Usage:

740B L4F

冷却液系统

------ WARNING! ------

有压力的系统: 热的冷却液能造成严重的烫伤。 为了打开盖子,要停机,等候散热器冷下来。 然后慢慢松开盖子,释放压力。


要释放冷却系统的压力,将发动机起动开关移到断开位置。 让冷却系统压力盖冷却下来。 盖温必须达到徒手可以触摸的温度。 慢慢取下冷却系统压力盖,以便释放压力。

燃油系统

要释放燃油系统的压力,将发动机起动开关移到断开位置。

高压燃油管(如有配备)

------ WARNING! ------

接触高压燃油可能导致液体渗透和烧伤危险。 高压燃油溢出可能会产生火灾。 如果不遵循检查、保养和维修指南,可能会造成人身伤亡。


高压燃油管是指高压燃油泵和高压燃油歧管之间的燃油管以及燃油歧管和缸盖之间的燃油管。 这些燃油管与其它燃油系统上的燃油管不同。

高压燃油管由于以下原因而不同于其他燃油系统上的燃油管:

  • 高压燃油管始终充满高压。

  • 高压燃油管的内部压力比其他类型的燃油系统要高。

在发动机燃油管上执行任何维修或修理之前,需执行以下任务:

  1. 把发动机的起动开关转到 OFF(断开)的位置。

  2. 等待 10 分钟。

    注: 燃油压力可通过 Caterpillar 电子技师(ET)来监控。

不要通过松开高压燃油管来排除燃油系统中的空气。

液压系统

------ WARNING! ------

增压系统!

液压蓄能器含有高压气体和机油。 请勿断开管路或拆解加压蓄能器的任何部件。 维修蓄能器或任何蓄能器部件前,应按照维修手册的说明从蓄能器中清除预充气体。

不遵循这些说明和警告会造成人身伤亡。

只能使用干燥的氮气加注蓄能器。 有关特殊设备和蓄能器维修和充注的详细信息,请咨询您的 Cat 代理商。


执行下述步骤以释放系统的全部压力:

  1. 起动发动机并完全缩回推料器铲刀。 将推料器控制装置移到浮动位置。

  2. 关闭发动机,然后将发动机起动开关转至接通位置。

  3. 按下行车制动器数次,直到释放行车制动器系统油中的全部压力。

  4. 将停车制动器控制器在接合位置和脱开位置之间移动。

  5. 重复步骤 3 至步骤 4。 重复该步骤数次,直到释放停车制动器系统油中的全部压力。

  6. 将发动机起动开关转到断开位置。

  7. 顺时针旋转方向盘,然后逆时针旋转方向盘。

  8. 小心地拆卸推料器和制动系统液压油箱的加注口盖。 拆下加注口盖将释放液压油箱中的全部压力。

  9. 小心地拆卸转向和风扇驱动系统液压油箱的加注口盖。 拆下加注口盖将释放液压油箱中的全部压力。

发动机机油系统

要释放机油系统的压力,将发动机起动开关移到断开位置。

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